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October 11, 2023 at 9:33 pm
ty_jpn
SubscriberDear everyone
When I run the following script, the analysis ends at the 8th loop.
I have the following outputs, what can I do about them?
*** WARNING *** CP = 2110.030 TIME= 05:22:15
Output entity is identical to the first input entity for VSBV command. No new entities created.
*** ERROR *** CP = 2333.973 TIME= 05:25:55
There is at least 1 small equation solver pivot term (e.g., at the VOLT degree of freedom of node 15727). Please check for an insufficiently constrained model.
------------------------------------------------------------------
fini
/cle
C*******************************************************************************
C*** ループ外のパラメータ
C*******************************************************************************
height = 20*1e-6
width = 100*1e-6
separation = 10*1e-6thickness_0 = (1*1e-6) ! 初期の電極の幅
d_thickness = 1e-6 ! 電極の幅の増分
n_thickness = 200 ! 調査する電極の幅のケース数*dim,C_results,,n_thickness,4 ! キャパシタンス結果を保存する配列
eps0=8.854e-12 ! 真空の誘電率
d_dmn = 100*1e-6 ! 電極を超えるドメインの深さ
d_inf = 5*1e-6 ! 無限バウンダリ要素メッシュの深さ
esz = 10*1e-6 ! メッシュのサイズ
V = 3 ! 適用される電圧C*******************************************************************************
C*** DOループ
C*******************************************************************************
*do,i,0,n_thickness-1 ! 電極の幅をループpars,all ! file.parmにすべてのパラメータを保存
fini ! MAPDLデータベースをクリア(これによりパラメータも削除されます)
/cleparr ! file.parmからMAPDLデータベースにパラメータを復元
thickness = thickness_0 + i*d_thickness ! i回目のループでの電極の幅
/title,THICKNESS = %thickness%
/vie,1,1,1,1
/sys,del file*.png/PREP7
C*** 電気静止解析のための3D 8ノード要素を設定
ET,1,SOLID123C*** 無限要素の定義
ET,2,111,2,1C*** 材料特性(真空中の相対誘電率)
MP,PERX,1,1 ! 相対誘電率C*** 最初のプレートを作成
BLOCK,0,width,0,height,0,-thickness
cm,electrode1_a,areaC*** 二つ目のプレートを作成
asel,none
BLOCK,0,width,0,height,separation,separation+thickness
cm,electrode2_a,areaC*** 周囲のドメイン
alls
cm,scrap1_v,volu
*get,xmin,kp,,mnloc,x
*get,xmax,kp,,mxloc,x
*get,ymin,kp,,mnloc,y
*get,ymax,kp,,mxloc,y
*get,zmin,kp,,mnloc,z
*get,zmax,kp,,mxloc,z
vsel,none
bloc,xmin-d_dmn,xmax+d_dmn,ymin-d_dmn,ymax+d_dmn,zmin-d_dmn,zmax+d_dmn
cm,scrap2_v,volu
alls
vsbv,scrap2_v,scrap1_vC*** メッシュ
esiz,esz
vmes,allC*** 電極の電圧
da,electrode1_a,volt
da,electrode2_a,volt,Vfini
C*** 解を求める
/solu
alls
save
solv
finiC*** ポストプロセス
/post1
set ! MADLデータベースに結果を読み込むetab,w,sene ! エネルギーに基づく
ssum
*get,Wnet,ssum,,item,w
C1 = 2*Wnet/(V**2)nsel,s,d,volt ! 電荷と電圧に基づく
fsum
*get,q,fsum,,item,chrg
c2 = q/vC_nominal=eps0*(height*width)/separation ! ノミナルフリンジフリーバリュー
/tla,-0.35,0.90,Capacitance (ANSYS, energy) = %C1% Fd ! 注釈
/tla,-0.35,0.85,Capacitance (ANSYS, Q/V) = %C2% Fd
/tla,-0.35,0.80,Capacitance (nominal fringe-free) = %C_nominal% Fdalls ! キャップ付きセクションプロット
wpro,,,90
wpof,,,width/2
/type,1,7
/cpl,1plns,volt
/sho,png $plns,volt $/sho,close $/wait,2
plve,ef,,,,vect,,on
/sho,png $plve,ef,,,,vect,,on $/sho,close $/wait,2C_results(i+1,1)=thickness ! C_results配列に結果を保存
C_results(i+1,2)=C_nominal
C_results(i+1,3)=C1
C_results(i+1,4)=C2*enddo ! DOループの終了
C*******************************************************************************
C*** C_results配列をresults.txtテキストファイルに書き込む
C*******************************************************************************
*cfopen,results,txt
*vwrite
(' thickness C_nominal C_ANSYS (Energy) C_ANSYS (Terminal Conditions)')
*vwrite,C_results(1,1),C_results(1,2),C_results(1,3),C_results(1,4)
(4X,E16.8,4X,E16.8,4X,E16.8,4X,E16.8)
*cfclosepars,all
save/eof
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October 12, 2023 at 12:47 am
ty_jpn
SubscriberErrors only occur in simulations when the thickness is 9 microns.
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